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Novel catalyst used in maleic anhydride liquid phase hydrogenation for preparing gamma-butyrolactone, and preparation method thereof

A technology for catalyst and hydrogen preparation, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problems of low catalyst activity and corrosion of halogen atoms, etc.

Inactive Publication Date: 2012-02-01
JIANGSU KANGHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although homogeneous catalytic hydrogenation has high selectivity to γ-butyrolactone, from a technical point of view, there are still disadvantages such as low catalyst activity, and many Ru complex catalysts also contain halogen atoms that can corrode reaction equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Dissolve 0.9910 g of nickel nitrate in 1.132 g of deionized water to form a solution, and then add it dropwise to 0.8 g of activated carbon carrier. The obtained sample was left to stand at room temperature for 12 hours, then dried at 120°C, and then added to the prepared ammonium molybdate aqueous solution (0.0602g ammonium molybdate, 1.5g deionized water) and left to stand at room temperature for 12 hours , dried at 120°C for 12 hours, programmed temperature to 400°C, reduced by hydrogen for 4 hours, then cooled naturally, added 40mL solvent, 4g maleic anhydride, 180°C, 6MPa for maleic anhydride hydrogenation reaction, γ-butyrol The yield of ester was 91.1%.

Embodiment 2

[0013] Dissolve 0.9910g of nickel nitrate and 0.0602g of ammonium molybdate in 1.132g of deionized water to make a solution, then dropwise add it to 0.8g of activated carbon carrier and impregnate it in equal volume at room temperature for 12 hours, dry at 120°C for 12 hours, and heat up to 400°C, hydrogen reduction for 4 hours, then natural cooling, add 40mL solvent, 4g maleic anhydride, 180°C, 6MPa for maleic anhydride hydrogenation reaction, the yield of γ-butyrolactone is 97.6%.

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Abstract

The invention discloses a novel catalyst used in maleic anhydride liquid phase hydrogenation for preparing gamma-butyrolactone. The catalyst is characterized in that: the catalyst is composed of a carrier, a main active component, and an auxiliary agent. The main active component is metal nickel, the auxiliary agent is molybdenum, and the carrier is active carbon. The product provided by the invention is advantaged in that: according to the invention, when the 20% Ni-Mo / AC catalyst prepared by using a co-impregnation method is used in a maleic anhydride hydrogenation, a result shows that the activity of the novel catalyst prepared with the co-impregnation method is high, and a gamma-butyrolactone yield reaches 97.6%. The invention also provides a preparation method for the novel catalyst used in the maleic anhydride hydrogenation for preparing gamma-butyrolactone, such that the product can be obtained.

Description

technical field [0001] The invention relates to a novel catalyst for preparing gamma-butyrolactone by liquid-phase hydrogenation of maleic anhydride and a preparation method thereof. The catalyst uses metal nickel as the main active component, molybdenum as the auxiliary agent, and active carbon as the carrier, and its preparation method includes a step-by-step impregnation method and a co-impregnation method. Background technique [0002] Liquid-phase hydrogenation of maleic anhydride can be divided into homogeneous liquid-phase catalytic hydrogenation and heterogeneous liquid-phase catalytic hydrogenation. The metal ions in the homogeneous catalyst used for the liquid-phase hydrogenation of maleic anhydride are mainly noble metals in transition metals such as Ru, Rh, Pd, etc., and non-noble metals such as Ni and Co, and the ligands are mostly organic phosphine. Although homogeneous catalytic hydrogenation has high selectivity to γ-butyrolactone, from a technical point of ...

Claims

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Application Information

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IPC IPC(8): B01J23/883B01J37/02C07D307/33
Inventor 邱志刚袁红霞
Owner JIANGSU KANGHENG CHEM
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